Pile-driver attachment for rock drills



Dec. 8, 1925.

C. C. HANSEN FILE DRIVER ATTACHMENT FOR ROCK DRILLS v INVENTORQ FiledAug. '7, 1925 Patented Dec. 8, 1925.

k UNITED STATES 1,564,956 PATENT OFFICE.

cEARLEs c. HANSEN, or EAs'roN, PENNSYLVANIA, ASSIGNOR TO INGERSOLL;RANDI COMPANY, or JERSEY CITY, NEW JEEsEY, A CORPORATION on NEW JERSEY. J

run-DRIVER 'A'rTAcHMEN'r on nook nRILLs.

Application filed August To all whom it may] concern:

Be it known-that I, CHARLES Q. HANSEN, a citizen of the United States,and a resident of Easton', in the county of Northampton and State ofPennsylvania, have invented a certain Pile-Driver Attachment for RockDrills, of which the following is a specification, accompanied bydrawings.

.This invention relates to pile drivers, but more particularly to a piledriver attachment for fluid actuated rock drills of the of operationsubstantially as hereinafter described and more particularly pointed outin the appended claims and illustrated in the accompanying drawings, inwhich Figure 1 is a view in elevation partly in section of the front endof a rock drill equipped with a pile driver attachment constructedlin'accordance with the practice of the invention,

. Figure 2 is a view in elevation partly in section taken through Figure1 on the line '22 looking in the direction of the arrows.

Figure 3 is a View similar to Figure 2 showing a pile driver attachmentconstruct ed to accommodate a metallic pile, and

Figure 4 is a transverse view in section taken through Figure 3 on theline 4-4 looking in the direction of the arrows.

Referring to the drawings, the invention is shown embodied in a fluidactuated hammer type rock drill in which a cylinder A is provided with areciprocatory hammer piston B. A front cylinder washer C seals the frontend of the cylinder A and is bored to receive slidably an anvil block D.In this instance,-the front cylinder washer C isprovided with a reducedforward extension E for centralizing-an attachment or front head Fsecured to the cylinder by suitable side bolts G arranged on oppositesides of the 7, 1925. serial No. 48,760.

drill and whereby'theparts comprising the drill casing are firmlyclamped in operative position. a In accordance with the practice of theinvention, the attachment or front head F carries at its forward end apairof parallel projections or walls H and J. The walls H and J are soconstructed with respect to each other that a space ,or slot K existstherebetween to receive a pile L or other similar member adapted to bedriven. A driving block 0, preferably of rectangular formation, isarranged slidably between the walls H and J and carries on one face aprojection P preferably of cylindrical cross sectional area which inthisinstance is off-set from the longitudinal axis of the driving blockand projects into a bore Q in the inner portion of the front head F toreceive the blows of the hammer piston B transmitted by the anvil blockD. In addition to receiving the hammer blows of the piston, theprojection -P also serves to hold the ,driving block 0 against endwisemovement. Although the rawings show an anvil block interposed betweenthe hammer piston and the driving block, it will readily be seen thatthe projection P of the driving block 0 could be formed to extend intothe cylinder A, in which case the blows of the hammer piston aredelivered directly to said projection.

In order. to prevent ejection of the driving block 0 from the front headF during the operation of the machinc, a check plate or plates R may besecured on the-inner face of the wall H in any suitable manner, as forinstance,bolts S. -The check plates R are preferably of a height topermit free reciprocation of the driving block 0 during,"

the, driving operation, but will prevent removal of the projection 'Pfrom'the bore Q when the machine is removed from the pile. As indicatedby the dot and dash lines in Figure 2, the cheek plates B may be of a Rany shock or blow delivered to the cheek' plate will be transmitted 'tothe flange T. I

"In order to prevent sidewise movement of the machine with respect tothe pile dueto vibration whenthe machine is in operation, a pin U issecured to the driving block 0 in any suitable manner and has a taperedpoint V which may be forced into 10 the *pldmg the machine in position.The pin.

l Holes Y are formed in the wall J to receive tapered ,lugs Z carried bythe cheek plate ile as shown in Figures land 2 for like the projection Pis also off-set from the longitudinal axis of the driving block toinsure proper engagement 'of said pin with piles of small width. I

- To the end that the front head F may accommodate a metallic pile L, a.check plate Wv may be arranged on the in sideof the wall J to form'aspace between the cheek'plates.

pile L, but is sufliciently narrow to prevent tilting of the machine onthe pile.

Whenever the machine is used for driving a metallic pile the pin U maybe re-. moved from the driving block 0 and the machine is prevented fromsliding off the pile by one or the other of the cheek plates whichcooperate with the inter-locking portion of the pile. v

The advantages of the invention reside chiefly in the fact that by.means of the ,at-.

tachment as hereindescribed, a rock drill of the hammer type may bereadily con- =verted into a pile driver by merely replac ing the.ordinary front head of the rock drill with the front head or attachmentde scribed herein. Another advantage is that little head roomis requiredfor a machine of this type as compared with pile drivers; of the triphammer type. Another desirable advantage is that'owing to the fact thata machine of this type will deliver-light blows in rapid succession, sothat piles of small cross sectional area may be driven or sunk withoutbuckling .or flexing the pile, and withoutshattering or-injuring the endof thepile on which the blows are -delivered.-

second The space X is of suf-' ficient width to permit free insertion ofthe specification.

I-claim:

1. In a pile driver attachment for actuatedrock drill of the hammertype, havp ing a cylinder and a reciprocatory hammer piston in thecylinder, the combination of a front head adapted to'be secured to thecylindeihavinga pair of -parallel walls, a rectangular driving block inthe front head slidable between the walls, a projection on-- the drivingblock to receive the blows of the hammer piston and for preventingendwise movement of the driving block, a cheek plate for preventingejection of the drivingblock from the front head and for engaging apile,

and a flange on one of the walls for supporting the cheek plate.

2. In a pile driver attachment for a fluid actuated rock drill of thehammer type, having a cylinder and areciprocatory hammer piston in thecylinder, the combination of a front head adapted to be secured to thecyl- 'inder having a pair of parallel walls, a rectangular driving blockin the front head slidable between-the walls, a projection on the"driving block to receive the blows of the hammer piston and forpreventing endwise movement of the drivin block, a pin carried by thedriving bloc for retaining the front head on a pile, an anvil blockbetween the'hammer piston and the projection for transmitting the blowsof saidhammer piston to the projection, a check plate for preventingejection of the driving block from the front head, and an inwardlyextending flange on one of the walls for supporting the I cheek plate.

3. In a pile driver attachment for a fluid actuated rock drill of thehammer type, having a cylinder and a reciprocator'y" hammer piston inthe cylinder, the combination of a front head adapted to be secured tothe cyl- 'inder having a" pair of parallel walls, a rectangular drivingblock in the front' head slidable between the walls, a projection on thedriving. block to receive the blows of the hammer piston and forpreventing endwise .movement of the driving block, said projection beingoffset from the longitudinal axis driving block to prevent relativeendwise movement between the front head anda pile, said pin being in thesame longitudinal plane as the projection, an'anvil block between thehammer piston and the projection for transmitting the blows of saidhammer piston to said projection, a check platefor preventing ejectionof thedriving block from the front head, and an inwardly extendingflange on fl one of the walls to serve as a bearing for the...

cheek plate.

' of the driving block, a jpin carried by the v In testimony whereof Ihave signed this OHARLESC.

